OpenAPI Initiative Publications

This site contains the authoritative HTML renderings of the OpenAPI Initiative’s specifications and extension registries.

Please see the Learn OpenAPI site for additional documentation and examples, and the OpenAPI Tooling site for community-provided lists of tools implementing the specifications.

Specifications

Each specification page lists all published specification versions and official (but non-normative) schema iterations.

• Arazzo Specification
• OpenAPI Specification
• Overlay Specification

Registries

The Registry Page includes documentation as well as API and RSS access for all registries

Registry shortcuts:

• Alternative Schema Type Registry
• Draft Features Registry
• Specification Extension Registry
• Format Registry
• Extension Namespace Registry
• Tag Kind Registry